Rotary pump



March 24, 1931. 3, w DQQLEY 1,797,905

ROTARY PUMP Filed June 14, 1927 0 24 2 Sheet s-Sheut l 1% @r. Ani

March 24, 1931.

\ G. w. DOOLEY ROTARY PUMP 2 Sheets-Sheet 2 Filed June 14, 1927 Patented Mar. 24, 1931 PATENT OFFICE GEORGE w. DOOLEY, or DUCOR, CALIFORNIA ROTARY PUMP Application filed June 14, 1927.

8 with a minimum of efi'ort and by a minimum number of actuating parts, or elements.

Another object is to provide a pump in which the stator and rotor conjointly form a working space for the pistons or vanes, which space may be varied by relative movements of the stator and rotor to vary the capacity or delivery.

To the above, and other purposes, which will appear, my invention consists in the novel construction, arrangement and combination of parts as hereinafter fully, clearly and concisely described, definitely pointed out in my claims and illustrated by the accompanying drawings, in which Fig. l is a longitudinal sectional elevation of a pump embodying my invention.

Fig. 2 is an elevation, partly in section, of the rotor body with the vanes removed.

Fig. 3 is a longitudinal sectional elevation of the stator, showing the camgroove for moving the vane.

Fig. 4 is an end elevation of the stator, showing, by dotted lines, the passage obstruction, the vanes, the cam groove and the inlet and exhaust.

Fig. 5 is a detail perspective view of one of the vanes.

Referring to the drawings, 1 designates the stator, or stationary shell, which is shown to have a removable head 2.

The numeral 3 designates the rotor, which is fixed for rotation with a shaft 4 supported in bearings 5, 5, of the stator. Fins, vanes or pistons, 6, 6, rotatable with the rotor are mounted for axial movements relative to the rotor preferably as by the slots 7 are normally held to engagement with a surface 9 of the stator, forming a part of the working space for the fluid acted upon, and are normally held as by springs 10 radially against the inner cylindrical surface 11 of the stator.

An abutment, or passage obstruction, 12 is mounted for axial movements in the stator, as by a slot 13, and normally yieldingly held to engagement with a cylindrical peripheral Serial No. 198,784;

surface 16 of the rotor, a part of the recited I poi-king space, as by a spring 14 and yieldmgly held to engagement with a surface 17 of the rotor forming a part of said working fil)2lt'(l, tl by a spring 15. Theworking space is indicated by the numeral 18 and is formed the recited surfaces 16 and 17 of the rotor and like oppositely disposed surfaces of the :JLntOl'. a

1 Ports E26, 26 formed through the stator at each side of the abutment 12 communicate with said working space and provide an inlet and outlet for fluid traversing the working space.

For the axial movement of the vanes to pass the abutment in their rotation through the working space there is provided a projection, or tooth 24 on each vane for riding in a cam groove formed in the inner cylindrical face of the stator and as best shown in Fig. 3 such groove throughout its major length is substantially parallel to a line at a right angle to the 'axis of the rotor and at a point axially ahned with the abutment is offset a distance corresponding with the required axial travel distance of the vane to pass the abutment.

For the axial movement of the rotor to vary the capacity of the working space the rotor carries an extension 21, for projection through anend, or head, of the stator, and for connection with lever 20, shown, and for the control, or relief of pressures internal of the stator, incidentto the shifting of the rotor there is provided ports, or vents, 19.

In the form illustrated the stator and rotor are'each constructed as an integral unit and include surfaces which conjointly form the working space, or vanej passageway; the stator includes also integral means providing for the abutment and for the movement of the vane, or vanes, and the rotor provides inte gral means for the reception of the vane, or vanes.

Obviously upon a rotation of the rotor as by power connected with the shaft 4 the vanes traverse the working space and move the liquid content thereof from one of the ports 26 to the other port 26, and upon a variation shifting means, such as the 1 of the capacity, or area of the working space, as by an axial shifting of the rotor there is a consequent variation in the volume of liquid moved.

Ihe structure of the several parts of the pump may be varied in form Without departure from my invention as hereinafter claimed. The showing of this, description and drawings being merely in illustration of I one embodiment of my invention in response to the statutory requirement to applications for patents.

What I claim is: 1. In a rotary pump, a stator having bores h of different diameters and a vertical annular face extending from the larger bore to the next smaller bore and a still smaller bore through its end plates to form the bearings of, and receive a shaft, a rotor mounted on said shaftfor axial and rotary movement therewith, said rotor having surfaces of proper diameter to closely, but movably, fit the bores of the stator and having an annular face extending from the larger diameter to the smaller diameter, said annular faces on the stator and rotor and the surfaces of the larger bore of the stator and the smaller diameter of the rotor forming the four side Walls of the annular Working passage of the pump, and means whereby the rotor-may be shifted axially in relation to the stator to vary the size of said passage. r

2. In a rotary pump, a stator and a rotor,

said stator having bores of different inside 5 diameters and said rotor having horizontal faces of diameters to closely fit the bores of said stator, substantially vertical faces formed on the stator and rotor, said stator having an abutment between its inlet and out- 40 let ports, said abutment being mounted for both axial and radial movement and having means to urge it to bear against the vertical and horizontal faces of the rotor.

3. In a rotary pump, a stator and a rotor,

5 said stator having bores of difierent inside diameters and said rotor having horizontal faces of diameters to closely fit the bores of said stator, substantially vertical faces 'l'ori'ned on the stator and rotor, said stator having an abutment between its inlet and outlet ports, said abutment being mounted for both axial and radial movement and hav ing means to urge it to bear against the vertical and horizontal v faces of the rotor, said rotor having vanes mounted for both axial and radial movement in relation to said rotor and means to normally urge said vanes to bear against the vertical face, and the horizontal surface of the larger bore of the stator, and 80 means to move the said vanes a sufficient distance away from the vertical face of the stator to allow them to pass said. abutment when the rotor is revolved.-

In testimony whereof, I affix my signature. GEORGE W. DOOLEY. 

